There may be issues with purchasing refractory bricks, according to many of my acquaintances. They are aware that they are purchasing refractory bricks, but clay and high alumina bricks frequently cause them a number of issues. I have no idea which one. What you need is that. You might also ask the customer service who offers refractory bricks, but even when they tell you, you won't understand. Therefore, we shall discuss these two categories of bricks today. What distinguishes bonded refractory clay bricks from high-alumina refractory bricks?
Alumina silicate refractory material with alumina content greater than 48% is known as refractory high alumina bricks. It is made from alumina or other raw materials having a high alumina concentration and then calcined. Above 1770°C, it exhibits significant thermal stability and refractoriness. good resistance to slag. blast furnaces, hot blast furnaces, electric furnace roofs, blast furnaces, reverberatory furnaces, and rotary kilns are the main applications for this material. High-alumina refractory bricks are also frequently used as nozzle bricks, plugs for pouring systems, open-hearth regenerative checker bricks, etc.
Clay refractory bricks are broken down by use, primarily into huge clay refractory bricks for glass kilns, hot blast furnace clay refractory bricks, and clay refractory bricks for blast furnaces. Clay bricks' thermal conductivity is 15% to 20% lower than that of silica bricks', and their mechanical strength is likewise lower. This is because clay fire bricks have a low softening temperature under load and shrink at high temperatures. lay refractory bricks are therefore limited to minor components of coke ovens. For instance, regenerator wall sealing, bricks for tiny flues and regenerator checkers, bricks for furnace doors, bricks for the roof and riser pipes of furnaces, etc.
Therefore, in general, the chemical pH value of high alumina bricks is neutral to alkaline refractory bricks, while refractory clay bricks are neutral to acidic refractory bricks. Except for thermal shock resistance, all physical and chemical properties of high-alumina refractory bricks are better than those of clay refractory bricks. In the construction of thermal equipment such as kilns, if clay refractory bricks are competent for the working environment, high-alumina bricks are not used .
